I overclocked my athlon II x2 245 from 2.9 to 3.4 no voltage increase. Stable while running Prime95.
Problem is it's sitting around 38-40C idle and around 52C load with stock hsf. Is that okay for this processor? Or should I back off a few hundred mhz?
With stock those temperatures are alright. But whats your ambient temp, you should be a bit lower considering its a dual core. Also increasing the speed w/o increasing voltage won't affect temps.